Automatic interval timing mechanism



8 Sheets-Sheet l Jan. 7, 1941. A. c. HANscH ETAL AUTOMATIC INTERVAL TIMIG MECHANISM Filed Dec. 2l, 1938 Jan. 7, 1941. A. c. HANscH ETAL 2,227,856

AUTOMATIC INTERVAL TIMING MECHNISM Filed Dem-21, 1958 v8 sheets-sheet 2 206 [1 209 E /00 47a 45A lNvEN-ro am/sr C /iq/vsc/f BY HENRY EHA/vsc/ f ATTORNEYS Jan. A7, 1941. A. c. HANSCH Erm.

AUTOMATIC INTERVAL TIMING MECHANISM Filed De. 2 1, 1958 8 Sheets-Sheet 5 k, W n n ,sw W W www.. uw M ,um M xml m w .ji m .4.. W 4... HHM m m W L J WH o o o @5 W K S MQ QS m S\ s m A *y j W xaw i. FFL- E! QQ QQ www. En v ,Sw www INVENTORS Aam/sr C. /fA/vscf/ BY ../fE/w? y EHA /vsaf/ KM 'fw- ATTORNEYS Jan. '7, 1941. A Q HANSCH E-l-AL 2,227,856

AUTOMATIC INTERVAL TIMING yMECHANISM Filed Dec. 2l, 1958 8 Sheets-Sheet 4 @f7 N 20 ma 20M l 33 257 @RL @Z 0/ 242 1 W0 3 ATTORNEYS Jan. 7, 1941. A. c. HANscH .e1-AL v AUTOMATIC INTERVAL TIMING MECHANISM Filed Dec.- 21, 1938 8 Sheets-Sheet 6 ATTORNEYS A. c. HANscH Erm.. 2,227,856 AUTOMATIC INTERVAL TIMING MECHANISM Filed Dec. 21, 1938 8 Sheets-Shea*l 7 TP# man. 9% ma@ Thr -om Thu .Q @w j lNvENToRs 4061/5 r C. HA/vsc/l BY /ff/my EHA/vac# Jan. 7, 1941.

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ATTORNEYS Jan. 7, 1941. A. c. HANscH ETAL AUTOMATIC INTERVAL TIMING MECHANISM Filed Dec. 21, 1938 .8 Sheets-Sheet 8 5 w n MHH m m IMMA HH CE. T wwf @NNY eroi 6M 2251 *5N Patented Jan. 7, 1941 UNITED STATES 2,227,856 AUTOMATIC INTERVAL TIMING MECHANISM August C. Bausch and Henry E. Hansclx, Whippany, N. J.

Application December 21, 1938, Serial No. 247,049 12 Claims. (Cl. 1611) This invention `relates to a time interval control apparatus for actuating one or more mechanisms at a plurality of -predetermined time intervals and While not limited thereto is applicable to the automatic timing of the composite exposure in the production of screen negatives.

The invention has particular reference to an apparatus for accurately and automatically converting the combined effects of a number of variable factors into a plurality of predetermined time intervals.

The invention comprehends .an-apparatus responsive to the predetermined selective setting of a variable speed mechanism functioning to operate a predetenmined actuator thereby effecting an actuation of a mechanism at a plurality of predetermined time intervals.

The invention, as applied to the production of screen negatives, further resides in an apparatus of the indicated character wherein a plurality of actuators cooperate with a variable speed mechanism for causing the actuators to operate mechanism thereby eiecting a change of lens stops at standard intervals of time in the photographic reproduction of an original of predetermined standard tonal ran'ge, at unity magniiication ratio, with the screen and light intensity upon the original of predetermined standard and meansior varying the duration of the intervals of exposure proportionate to modifications from the stand-A ards due to the required original, magnification ratio and screen and actual light intensity upon the original.

The invention, in its application to the production of screen negatives,l further provides means for selectively receiving and supporting any one of a plurality of interchangeable actuators having control elements positioned at predetermined spaced distances for effecting the duration of time intervals during the exposure 'off screen negatives.

The invention further embodies in an apparatus of the character set 'forth a plurality of banks of gears, each bank having a set of manipulator buttons adapted to conveniently shift the gears so that the same cooperatively function to eiect any one of a plurality of definite speeds for the movement of 'the actuator with means for precluding the shifting to active position of more than one gear of each bank.

With the above enumerated and other objects in view, the invention is more fully disclosed in the following specication and illustrated in the accompanying drawings in which:

Fig. 1 is a top plan view ci the time interval control apparatus constructed in accordance with the invention with parts broken away and shown in section to disclose the underlying structure.

Fig. 2 is a transverse sectional view taken approximately on the line 2--2 of Fig. 1. 5 Fig. 3 is a fragmentary vertical sectional view taken approximately on the line l-J of Fig. 2.

Fig. 4 is a side view of the variable speed drive mechanism.

Fig. 5 is a transverse sectional view .therel0 -through 'taken approximately on the line 5--5 of Fig. 4.

Fig. 6 is a horizontal sectional view thereof taken approximately on the line 6-6 of Fig. 4.

Fig. 7 is a detail horizontal sectional view of 15 the push button deten't bars taken approximately on the line 1-1 of Fig. 5.

Fig. 8 is an enlarged sectional view taken approximateiy on the line 8-8 of Fig. 7, illustrating the push button control mechanism for shifting 20 the gears.

Fig. 9 is a sectional view taken approximately on the line 9-9 of Fig. 8.

Fig. 10 is an enlarged detail side view of the timer head and supporting arm therefor.

Fig. 11 is a fragmentary enlarged bottom plan View of the timer head.

Fig. 12 is a view of the wiring 'diagram df the time interval control apparatus.

Fig. 13 is a fragmentary diagrammatic view of 80 the push button control for the gearing illustrating indicia for guiding the operator in using the same.

Fig. 14 is a diagrammatic view of a modiiled form of actuator mechanism.

Referring to the drawings 'by characters of reference, the apparatus includes a base A upon which is mounted an actuator mechanism designated generally by the reference character B and a variable speed drive mechanism therefor designated generally by the reference character C. The lactuator mechanism includes a turn table 20 which is secured to the upper end of a vertical shaft 2l journaled in bearings 22 and 23 of a frame work 24 supported on the base. The shalft 2| has secured to Aits lower end a milter gear 25 meshing with a miter pinio'n 26 secured to a shaft 21 journaled in aligned bearings 28 of the frame work 24. Motion is transmitted from the variable speed gearing mechanism C to the shaft 21 by means of a sprocket lchain 29 trained around a sprocket 30 on the shaft 21 and a sprocket Il which is secured to the out-put shaft 32 of the variable speed gearing mechanism C.

A constant speed motor 33 is connected to and drives the :ln-put shaft 34 of the variable speed iournaled for rotation in rock arms 3|, 32 and 33 gearing mechanism C through the medium of which are fulcrumed in the frame brackets 43 suitable gearing in the reduction gear box 35 4| and 42 for lateral swinging movement. A pair driving an idler gear 33 which meshes with a gear of sets of gears are secured on the shaft 33 for 31 on the in-put shaft 34. rotation therewith, the sets of gears corresponds The variable speed gearing mechanism ining in number to the gears on the shaft 33 and cludes, in addition to the out-put and in-put the gears on the shaft 32 respectively. The shafts 32 and 34, which are arranged in parallel gears 35, 33, 31 and 33 are of successively inrelation, a pair of shafts 33 and 33 respectively, creasing size and are adapted to have respectively 1o disposed in axial alignment with the shafts 32 meshed therewith the gears 53, 33, 3| and 32 of l0 and 34 and the said shafts 32, 34, 33 and 39 are the shaft 33 when the latter are shifted to active journaled in frame brackets 40. 4| and 42 for inposition to thereby vary the speed of rotation dependent rotation with reference to each other. of the shaft 33. 'I'he remaining set of gears on The in-put shaft 34 has splined lthereon for rothe shaft 83 include the gears 33, 3|, 32 and 93 l5 tation therewith a plurality of slidable gears, which are of successively decreasing size and 15 four being shown in the present instance and adapted to have meshed therewith the gears 41, designated by the rei'erencel characters 43, 44, 43, 49 and 53 on the out-put shaft 32 when said 45 and 43. The gears are of successively increaslatter gears are shifted to active position so as ing size and are adapted to be shifted axially of to vary the speed of rotation of the out-put shaft the shaft in opposite directions to active and ln- 32. Motion is transmitted from the shaft 33 to 20 active positions. 'Ihe out-put shaft Y32 has the shaft 38 by a pair o! meshing gears 34 and splined thereon for rotation therewith a plu- 95 keyed respectively to the Shafts 33 and 33. rality of gears, four being shown in the present In order to provide means for shifting the instance and designated by the reference chargears of the groups 43 to 45 inclusive, 41 to 53 acters 41, 48, 49 and 50, the gears being of sucinclusive, 55 to 53 inclusive, and 53 to 32 inclu- 25 cessively increasing size and adapted to be shiftsive, a bell crank lever |00 is provided for each ed axially of the shaft 32 in opposite directions gear which is fulcrumed at |3| to a bracket |32 to active and inactive positions. depending from an overhead plate |03 supported The shaft 39 which is disposed in alignment by the frame brackets 43, 4| and 42. Each bell with the in-put shaft 34 has splined thereon for crank lever is formed with a depending forked 30 rotation therewith, a plurality of gears. four terminal |34 which engages with the grooved hub being shown in the present instance, designated |05 of the gears. The terminal |36 of the horiby the reference characters 55, 55, 51 and 53, zontal arm of each bell crank is normally urged said gears being of successively increasing size upwardly by a leaf spring |31 to normally shift `35 and adapted to be shifted axially of the shaft 39 the gears to an inactive position. The bell crank 35 in opposite directions to active and inactive posilevers |00 are swung to move the gears to an tions. The shaft 33 which is disposed in alignactive position by means of a vertical push rod ment with the out-put shaft 32 has splined there- |03, the lower reduced portion |09 of which is on for rotation therewith a plurality of gears, mounted for guided movement through openfour being shown in the present instance and inings llo in the plate in: and the upper portion 40 dicated by the reference characters 59, 63, 3| and of which is mounted for guided movement in an 52, said gears being of successively decreasing Opening in a plate I2 superposed with refersize and adapted to be shifted axially of the ence to the plate |03, the lower terminal of the shaft 38 in opposite directions to active and ln- Ieduced lower portion |09 engaging with the teractive positions. minal |35 of the horizontal arm of the bell crank 45 The variable speed drive mechanism further lever. Each push rod 1S Provided at the lunoincludes a shaft 55 parallel to and extending ture of the reduced lower end |39 with the uplongitudlnally alongside of the shafts 34 and per portion thereof with a frusta-conical collar 39, said shaft being iournaled in the rock arms H3 which tapers downwardly and a coiled ex- 66, 51 and 68 which are fulcrumed on a longipans-lon Spring H4 Surrounds the lower reduced 50 tudinally extending rod 59 which is carried by portion |09 and is interposed between the collar the frame brackets 40, 4| and 42 respectively, and ||3 and the plate |03 for the purpose of normally are adapted for lateral swinging movement. raising the push rod |33 until the collar 3 en- The shaft has secured thereon for turning gages the underside of the superposed plate ||2. 55 movement therewith two sets of gears, each set The superposed plate 2 is supported from 55 corresponding in number to the slidable gears and spaced above the plate |03 by longitudinally on the in-put shaft 34 and the slidable gears on spaced pairs 0f Studs H5 for each longitudinal the shaft 39 respectively. The first set of gears IOW of push rods |035' The Studs are grooved at includes the gears 10, 1| 12 and 13 with which ||6 to guidedly support a detent bar ||1, one of the gears 43, 44, 45 and 46 are adapted to mesh which detent bars is provided for each group of 00 when the latter are shifted to active position. gears 43 t0 43 inclusive, 41 to 50 inclusive, 55 to The gears 'I0 t0 13 inclusive, decrease in size and 58 inclusive and 59 t0 62 inclusive. The detent consequently vary the relative speed of rotation bar 1S provided with an aperture H8 for each of the shaft 55 with reference to the in-put shaft push rod |03 of the group, said aperture .being 34. The second set of gears includes the gears of a size to permit the frusto-conical collar ||3 65 14, 15, 16 and 11 which are successively of deto freely pass therethrough. 'I'he detent bars are creasing size and with which the gears 55, 55, 51 normally urged longitudinally in one direction said latter gears are shifted to active position, so direction by means of a coiled contractile spring as to vary the relative speed of rotation of the I9, in the present instance two springs I9 be- 70 shaft 39. ing employed,one for each pair of longitudinally Arranged at the opposite side of the variable aligned detent bars and interconnected therespeed gear transmission is a shaft 00 which exwith. It thus follows that when any one of the tends longitudinally 4of and parallel to the outpush rods |33 of a group of gears is depressed put shaft 32 and the shaft 38. 'I'he shaft 30 is against the action of its spring ||4, the lower 75 amanece l 3 terminal thereofengaging the terminal |55 of the horizontal arm of the bell crank |55 swings the same downwardly against the' action ofthe leaf spring |51 and by means of the shifting fork terminal |54, shifts the gear of said bank to aotive position to mesh with its respective gear` on the shaft 55 or 55 respectively. As the push rod |55 moves downwardly, the detent bar ||1 will be cammed longitudinally by the tapered face of the collar ||5 until the upper surface of the collar is disposed below the undersurface of the detent bar. The spring ||5 will then function to shift the detent bar I1 longitudinally in the opposite direction to retain the push rod |55 in itslow'ered position and thereby hold the gears in mesh. l

By this construction the-possibility of more than one gear of a group being meshed is precluded due to the fact that the longitudinal shift- 25 ing of the detent bar by the depression of one push rod |55 will automatically effect the release of any previously depressed push rod and the resultant shifting of its gear to an inactive position. The push rods |55 extend upwardly 25 through openings in a cover plate |25 and are provided at their upper ends with enlarged push buttons which buttons are respectively identified with their corresponding gears by the reference characters A t 45A; 41A to 55A; 55A t0 "A 30 and 59A to 52A.

The actuating mechanism B further includes a plurality of timer disks |55 each of which is provided with a central opening and circumferentially spaced openings |52, the central opening being adapted to receive an upwardly projecting center stud |55 and the circumferentially spaced openings |52 being adapted to receive the studs |54-so` as to center the disks on and conneet the same with the turn table for turning o movement therewith.

The outer. edge of each timer disk |55 is provided with a circumferentially extending recessed edge |55 which terminates in a cam portion |55 merging into the outer periphery |51 of the disk; A cam lug |55 is secured to the disk |55 for circumferential adjustment thereon by means of screws |55 extending through openings |55. The outer arcuate edge |5| of the cam lug |55 is disposed intermediate of and concentric with the recessed edge |55 and the outer periphery |51 of the timer disk. g

A pair of mercury switches |52 and |55 are carried by a transverse rock shaft |54 which is journaled ln bearing brackets |55 on the framework 24. 'I'he mercury switches are set at relatively different angles at a tangent to the shaft so that when the shaft is rocked in opposite directions from an intermediate position with both switches off the switches will be selectively moved to their closed positions. The rock shaft |54 is provided with a radial arm |55 provided with a laterally projecting pin |51 which is engaged by the bifurcated terminal |55 of the arm |55, of a rock lever fulcrumed on a transverse rod |1| mounted in brackets on the framework 24. The opposite arm |12 of the rock lever |25 is provided at its free terminal with a roller bearing |15 which is adapted to be normally swung towards the periphery of the disk by means of a coiled spring |14 which is 'anchored at one terminal |15 connected to the radial arm |11 carried by the rock shaft |54. When the roller bearing |15 is in engagement with the outer arcuate edge |5| of the cam lug |55. the rock shaft |54 is in a neutrai position so that both of the mercury switches |52 and |55 are inactive, thereby opening the circuits which they control. When the disk |55 is rotated in a counterclockwise direction, as indicated by the arrow in Fig. 1, the roller bearing terminal |15 will be moved by the spring |14 into 5 contact with the recessed edge |55 thereby rocking the rock shaft |54 to a position whereby the mercury switch |52 will be actuated to close its circuit. Continued turning movement of the disk |55 will cause the roller bearing terminal |15 to 15 be swung outwardly as it rides over the cam portion |55 until it engages the outer periphery |51 of the disk |55. This will effect the rocking of the rock shaft |54 and the movement of the mercury switches to a position whereby the switch 15 |52 will be disposed in an inactive position, while the switch |55 will be disposed in an active position. l

Each timer disk |55 is providedl with one or more concentric grooves in the upper surface thereof, two being shown in the present instance, namely an outer groove |55 and an inner groove |5|. The actuator mechanism also embodies a timer head, 'designated generally by the reference character |55 which is carried by one terminal of 25 an arm |55 which is fulcrumed at |51 to an annuius |55 swiveled in the upper end of a tubular bearing element |55 which bearing element is detaohably mounted on a juncture box |95. The timer head is provided with a depending stylus pin |5| adapted to be selectively engaged in the guide grooves |55 and |5|. The timer head has journaled therein for turning movement, a vertical crank shaft |52 which is provided with a crank terminal |55 at its lower end formed with a head 35 |54 having oppositely beveled faces |95 and |55, and said crank shaft has secured thereto a cross rod |51. The tail portion |554 of the arm |85 has iournaled transversely therein a rock shaft by which is carried a plurality of mercury s tches 255', 25|, 252 which are set at relatively different angles and at a tangent to the shaft |95 so that when the shaft is rocked in opposite directio'r'is from a normal intermediate position wherein 'all switchesare off, the switches will be selec- 4s tively moved to positions to close their circuits in thefmanner hereinafter described.

In order to impart rocking motion to the rock shaft |55, the said shaft is provided with an upwardly projecting radial arm 253 adjacent one end'thereof and with a downwardly projecting radial arm 254 adjacent the opposite end thereof which arms are respectively connected by cables 255 and 255 to opposite terminals of the cross rod |51. 55

The timer disk is provided with upstanding timer head control pins circumferentially spaced thereon adjacent to and on opposite sides of each groove |55 and |5| which are adapted, as the disk is turned in the counter-clockwise direction, to contact with the beveled vfaces |55 and |55 of the crank terminal head |55. The first timer head control pin 251 which is on the inner side of the groove |55 engages with the beveled face |95 and effects the turning of the crank shaft |92 and the 65 cross rod |51 in a direction to rock the rock shaft |55 to cause the mercury switch 255 to be actuated momentarily to close its circuit while the control pin is in contact with the beveled face thereof. The second timer head control pin 258 is disposed on the outer side of the groove |55 to engage the opposite beveled face |95 of the crank terminal head |54 to turn the crank shaft |52 in a direction to swing the cross rod |51 so as to rock the rock shaft |55 in a direction to cause the 75 switch 20| to be moved to a position to momentarily close its circuit while the control pin is in contact with the beveled face, the other switches remaining open. The next following timer head control pin 209 which is disposed on the inner side of the groove is adapted to engage the beveled face |95 of the crank terminal head |94 to actuate the mercury switch 200 to momentarily close its circuit, while the other switches remain open. The final timer head control pin 2 |0 which is on the outer side of the groove |80 engages with the beveled face |98 and effects the turning of the crank shaft |92 and the cross rod |91 in a direction to rock the rock shaft |99 to close the mercury switch 20|, the movement being sumcient to also cause the mercury switch 202 to close its circuit, while the mercury switch 200 remains open.

Ihe shafts 65 and 80 are normally moved laterally to dispose the gears out of meshing position with the gears on the shafts 32, 84, 88 and 39, and said shafts are moved laterally inward to meshing position by a. suitable mechanism which includes a pair of levers 2|5 and 2|8 which are respectively fulcrumed at 2|1 and 2|8 to the plate H2, the angular terminals 2|8 and 228 of which are respectively connected with the intermediate rock arms 82 and 81. The opposite terminals 22| and 222 of the levers 2|5 and 2|8 are connected with plungers 223 and 224 slidable in fixed cylinders 225 and 228. Coiled expansion springs 221 and 228 are arranged within the cylinders to exert a tension against the plungers for the purpose of normally swinging the levers in a direction to effect the movement of the shafts and 80 laterally outward to a position to dispose the gears thereon in a non-meshing position with the gears on the shafts 32, 34, 38

and 39.

Conduits 230 and 23| communicating with the cylinders 225 and 228 and with a manifold 232 which in turn communicates with a suction pipe 233 connected with and leading to a suitable source of suction whereby when suction is applied a partial vacuum is created in the cylinders 228 and 228 to swing the levers 2|5 and 2|8 in a direction to move the shafts 85 and 80 laterally inward whereby the gears on the shafts 85 and 80 are in a position to permit of the meshing of the gears on the shafts 32, 34, 38 and 38 therewith. When the suction is discontinued, the springs 221 and 228 function to swing the levers in a position to rock the shafts 85 and 80 outwardly as hereinbefore described.

The apparatus further includes an electrical circuit in which 240 represents a source of supply from the opposite sides of which circuit wires 24| and 242 lead. From the circuit wire 24| a branch conductor 243 leads to the constant speed motor 33. A return wire 244 leads from the motor 33 to the contact 245 spaced from a contact 248 from which a wire 241 leads to the other circuit wire 242. A bridge piece 248 is adapted to close the motor circuit when it engages the contacts 245 and 248 and when the manually operated switch 250 in the circuit wire 242 is closed. 'I'he circuit wire 24| extends to and is connected with a branch wire 25| which connects with a vacuum motor 252 providing the source of suction for the suction pipe 233. A conductor 253 leads from the vacuum motor 252 to a contact 254 and a spaced contact 255 is connected by a wire 258 with the circuit wire 242. A bridge piece 251 is adapted to close the vacuum motor circuit when the switch 288 is closed and the bridge engages the contacts 284 and 288.

The mercury switch |82 which in the present disclosure of the invention is designed to control ductor 244, while a second conductor 28| leads therefrom to the flash lamp 282. A conductor 288 leads from the ash lamp 282 to the circuit wire 24|. The arc lamps 288 which are included in a circuit having a separate source of supply have conductors 288 and 281 leading from the mercury switch |88.

The stop plate 218 having a plurality of stop openings 21|, 212, 218 and 214, for the nach, detail, highlight and middletone stops, is controlled by oppositely disposed solenoid Operated latches 218 and 218 and the solenoid 211 controlling the latch 218 is connected with the merculy switch 288 by a circuit wire 218 1 is connected wire 21s through a branch wire m with the wire 258 which leads to the source 0f Supply 248 through the circuit wire 242. A wire 28| leads from the solenoid 211 and connects with the other circuit wire 24|. The mercury switch 28| which controls the solenoid 282 for operating the stop plate latch 218 has one of its contacts connected by a conductor 288 with the solenoid 282, the other side of which solenoid is connected by a wire 284 with the wire 28| which leads to the circuit wire 24|. of the mercury switch circuit wire 288 with the branch wire 280 in turn connected with the wire 258 leading to the source of supply 240 through the circuit wire 242.

'I'he arc lamp circuit provided with spaced contacts 298 and 28| which are adapted to be bridged by a bridge piece 282. The bridge pieces 248, 251 and 282 are attached a shift rod 298, the movement of which in opposite directions to make and break the circuits is effected by means of a remote control mechanically held switch operating device 294 which may be of any of the well known types which are now in general use.

In the present instance, the device 294 is remotely controlled by means of the mercury switch 202 from the contacts of which respectively lead the circuit wires 295, and 288, the former connecting with a conductor 291 and the latter connected with the wire 24|. 'I'he conductor 291 which leads into the device 284 is connected with a feed wire 298 and is controlled by a push button switch 299. A second input wire 300 extends from the feed wire 298 into the device 294 and is provided with a push button switch 30|. A return wire 302 leads from the device 294 and is connected with the conductor 242.

In use and operation of the apparatus as applied to the production of screen negatives, a plurality of stop plates 210 having flash, detail, highlight and middletone stop openings varying in size, are adapted to be selectively employed and a plurality of timer disks |50 are selectively utilized. The operator initially selects one of the plurality of stop plates 210 as required by screen and camera extension employed, which stop plate may be regarded as standard. The proper timer disk is also selected as required by tonal range of 'the copy being reproduced and positioned on the 28| is connected by a The other contact point 35 wire or conductor 288 is w turn table 20, the stylus pin |9| being positioned in the proper grooveor |8| as the case may be. 'Ihe push buttons 49A, 61A, 56A and 59A are then depressed to set the gears of the variable speed drive mechanism for operation at standard and a switch 60| is closed to start the motor and eiiect operation of the apparatus, it being understood that the main switch 250 is closed at the beginning of the day.

The initial movement imparted to the turn table to turn the same together with the timer disk i60 in the direction of the arrow in Fig. 1 causes the roller bearing terminal H3 which is initially positioned against the outer arcuate edge |68 oi the cam lug i60 of the rock lever 10 to move radially inward with reference to the timer disk until said bearing terminal engages the recessed edge 955, thus rocking the mercury switch |162 to a position to close the circuit to the 'ash lamp 262 which illuminates the nlm through the ash stop opening 21S in the stop plate 210. Continued rotation of the timer disk |50 in the direction of the arrow causes the cam portion |58 to engage with the bearing terminal |13 of the rock lever |10 and swing the same in a direction to rock the mercury switch |62 in the opposite direction to break the circuit to the iiash lamp terminating the flash exposure. Simultaneously, with the termination of the flash, the swinging movement of the rock lever |10 rocks the mercury switch |69 to a position to close the circuit ,to the arc lamps 265, thereby illuminating the surface of the copy being reproduced. The arc lamp circuit remains closed through the complete balance of the cycle of operation due to the fact that the bearing terminal |13 retains the mercury switch in this position through engagement with said bearing terminal with the outer periphery |51 of the timer disk.

As the timer disk continues to rotate, the stylus pin |9| engaging in the groove |8i, as illustrated, guides the beveled face of the crankshaft head |94 into engagement with the irst timer head control pin 201 and effects the turning of the crankshaft |92 and the cross rod |91 in a direction to rock the rock shaft |99 thereby causing the mercury switch 200 to be actuated to close its circuit to theelectro-magnet 211 and allowing the stop plate 210 to drop until the latch 218 engages in the notched edge of the stop plate so as to ex.- pose the lm through the detail stop opening 212.

Continued rotation ofthe timer disk |50 causes the beveled face |95 todisengage the rst control pin 201 thereby rocking the mercury switch 200 to its neutral position. The beveled vface |96 of the crank terminal head |94 is then engaged by the next succeeding timer head control pin 200 which rocks the rock shaft |99 in the opposite direction to close the mercury switch 20| controllling the circuit to the magnet 282 thereby releasing the latch 216 and allowing the stop plate to drop until it is engaged by the latch 215 to expose the film through the highlight stop opening 213.

When the second control pin has passed beyond the beveled face |96, the mercury switch 20| is restored to its normal position. Continued movement of the disk causes the beveled face |95 of the crank terminal head |9| to be engaged by the next succeeding timer head control pin 209 which again moves the mercury switch 200 to a position to close the circuit to the solenoid 211 for retracting the latch 215 and permitting the stop plate to drop until its notched edge is engaged by the latch 216 thereby completing the exposure of motor and the arc lamps.

ihe iilm through the middletone stop opening When the nal timer head control pin 2|0, which is of greater height than the pins 201, 200 and 209, engages the beveled face |96 of the crank terminal head |9|, the rock shaft |99 is rocked in a direction to close the mercury switch 202. This is eilected due to a greater throw oi the rock shaft by the engagement of the upper end of the pin 2|0 with the extended upper portion i 96A of the beveled face i96 oi the crank terminal head 94. This closes the circuit to the remote control mechanically held switch operating device 294, the current flowing from the source of supply 290 to the wire 29|, the wire 296, the mercury switch 202, the wire 295, the wire 291, the switch operating device 296i and thence through the Wire 992 to the wire 242 leading to the other side of the source of supply 240. As-

suming that'the bridge pieces 249, 251 and 292 are in engagement with their respective contacts, the shift rod 299 will then be moved downwardly immediately upon closing the mercury switch 202 thereby simultaneously breaking all of the circuits to the vacuum motor, the constant speed After the cycle of operation of the apparatus is completed and the bridge pieces are in open relation to their contacts. The switch 30| is closed at the start of the production of each screen negative to effect the re-engagement of the bridge pieces with their contacts. This initiates the starting of the motors 93' and 252 and effects a re-operation oi the device. The push button switch 299 may be utilized as a means for manually stopping the apparatus in lieu of the mercury switch 202.

In event the screen employed or the light intensity deviates from standard, other combinations of push buttons controlling the banks of gears re depressed which mesh the required gears and produce the speed to compensate for said variations. The correct push. button of the remaining bank of gears is depressed so as to compensate for deviation from the standard or available sizes of stop openings and the required size of stop openings.

As illustrated in Fig. 13, the push buttons 43A to 46A and 55A to 58A are utilized for screen photography to set the gearing in accordance with the screen employed, and push buttons 43A to 46A are selectively depressed with the push buttons 55A to 58A for screens varying from fty to two hundred lines to the inch, the combination of push buttons 43A and 56A being employed for standard screen of one hundred and thirty-three lines to the inch. In event any other screen is used, the diagram illustrates the combinations which are employed to set the gearing for a particular screen. For instance, if a screen having one hundred and seventy-ve lines to the inch is used, push buttons 45A and 55A are depressed, while if a screen of eighty-ve lines to the inch is used, push buttons 44A and 51A are depressed. When the light intensity is standard or one hundred percent, push button 59A is depressed, whereas ifthe light intensity deviates from standard one of the remaining push buttons 60A, BIA or 62A is depressed in accordance with the light intensity. Where the stops required are available, push button 41A is depressed and this is considered as standard, whereas if the stops required are in between those available, one of the remaining push buttons 48A, 49A or 50A is employed. For instance, if the stop openings required are of a size midway between two adjacent available stop plates, the push button 48A is used. Whereas, if the stop openings required are of a size which would fall between midway and the two adjacent available stop plates, the buttons 48A and 50A would be selectively used.

In lieu of the actuator mechanism A previously described, the invention comprehends a modiiied form thereof as illustrated in Fig. 14, wherein circuits to the electro-magnetic latches 215 and 216 are actuated by a` low voltage. In this instance, the turn table 20, which is of a conducting material and secured to a shaft 2| oi a conducting material, is adapted to selectively receive timer disks 150A of an insulation material having a bottom plate 50B of a conducting material which rests upon and contacts with the turn table 20. Each timer disk |50A has any number of annular stylus pin guide grooves |80 and |8| to receive the stylus pin contact element 202A carried by a timer head |85A of insulation material and from which stylus pin contact element a circuit wire 202B leads to an electromagnetic switch 202C which controls the opening and closing of the circuit in which the remote control mechanically held switch control device 284 is arranged. The shaft 2| of the turn table has connected therewith, by a wiper contact, a conductor 3|!! which leads therefrom to one terminal of the low tension side of a transformer 3| l, the opposite terminal of which has a conductor 3|2 leading therefrom. The timer disk grooves are each provided on the bottom walls thereof at the stop position with a contact 3|3 which is connected by a conductor pin 3H with the bottom plate 50B. The timer disk is further provided at opposite sides of each of the grooves with contacts 3|5 and 3|6 circumferentially spaced thereabout and electrically connected by pins 3|1 with the bottom plate |B.

The timer head IBSA is provided with spring contact iingers 200A and 2n|A which are adapted to wipe over the upper surface of the timer disk 150A as the same rotates so that the low tension circuit is completed through the conductors 200B and 2MB to the solenoids 211 and 288 which operate the electro-magnetic latches 215 and 216 which control the stop plate 210. In order to complete the low tension circuits to the various solenoids and magnets therein, a circuit wire 320 leads from the conductor 3| 2 through the winding of the electro-magnetic switch 202C and a manifold circuit wire 32| leads from the conductor 3|2 to the solenoids 211 and 288 respectively. In all other respects the apparatus works in the manner set forth in the previous form of the invention, the only purpose oi the modification is to provide the circuits directly controlled by the timer disk with low tension current.

What is claimed is:

1. In an apparatus of the character described, a driven actuator, a variable speed mechanism operatively connected to said actuator for driving the same, said mechanism including a plurality of manipulators for selectively establishing the speed of said actuator, and means responsive to the setting of certain of said manipulators for causing said actuator to move at a predetermined standard speed, means engageable with said actuator and responsive to the movement thereof for effecting the operation of a device at standard time intervals when said actuator is driven at said standard speed, and said mechanism further including means responsive to the selective setting of certain of the remaining manipulators for causing a variation in the speed of the actuator from said standard speed and for thereby varying from standard the time intervals of operation of said device.

2. In an apparatus of the character described, a driven actuator, a variable speed mechanism operatively connected to said actuator for driving the same, said mechanism including a plurality ol sets of manipulators for selectively setting the same to drive said actuator at different speeds, and means responsive to the setting of one manipulator in each set of manipulators for driving said actuator at a predetermined standard speed, means engageable with said actuator and responsive to themovement thereof for effectingthe operation oi' a device at standard time intervals when said actuator is driven at said standard speed, and said mechanism further including means responsive to the setting of any one o! the remaining manipulators of said sets of manipulators for causing a variation in the speed of the actuator from standard and for thereby varying from standard the time intervals of operation of said device.

3. In an apparatus of the character described, a driven actuator, variable speed mechanism operatively connected to said actuator for driving the same, said mechanism including a plurality of independent banks of gears, and means for coupling one gear of each bank in series to drive said actuator at a standard speed, means engageable with said actuator and responsive to the movement thereof for effecting the operation of a device at standard time intervals when said actuator is driven at said standard speed, and said mechanism further including means for selectively coupling any one of the remaining gears of one bank in series with any one of the gears of the other banks for varying said speed of the actuator from standard and for thereby varying from standard the time interval of operation oi said device.

4. In an apparatus of the character described, a driven actuator, said actuator including a plurality of control elements disposed at predetermined relative positions; a variable speed mechanism operatively connected to said actuator for driving the same, said mechanism including a plurality of manipulators i'or selectively setting the same to cause said mechanism to drive said actuator at different speeds, and means responsive to the cooperative setting oi' certain of said manipulators to cause said mechanism to drive said actuator at a predetermined standard speed; means having a cam head disposed in the path of movement of said control elements and actuated by engagement therewith for effecting the operation of a device at a plurality o! successive standard time intervals when said actuator is driven at said standard speed and said mechanism further including means responsive to the setting of certain others of said manipulators so as to vary the speed of the actuator from standard and for thereby varying the time intervals of operation of said device.

5. In an apparatus of the character described, a rotary support, a timer disk adapted to be mounted upon said support to turn therewith; a variable speed mechanism operatively connected to said support for driving the same, said mechanism including a plurality of independent banks of gears, and means for coupling a certain gear of one bank in series with a certain gear Vof each of the remaining banks to drive said rosaid circuit; and a switch actuating mechanism having guided engagement with said guide track and including means disposed in the path of movement of said control elements for successive engagement therewith to actuate said switches so as to eiect the opening and closing of said circuit and thereby effect the operation of a device for predetermined standard periods of time when said mechanism is driven at said standard speed.

6. In an apparatus of the character described, a rotary support; a timer disk adapted to be mounted upon said support to turn therewith; a variable speed mechanism operatively connected to said support for driving the same, said mechanism including a plurality of independent banks of gears, and means for coupling a certain gear of one bank in series with a certain gear of each oi' the remaining banks to drive said rotary support and timer disk at a predetermined standard speed; said timer disk having a concentric guide track and a plurality of control elements spaced along said track; an electric circuit connected with a source of current supply; a plurality of switches arranged lin parallel in said circuit; a switch actuating mechanism having guided engagement with said guide track and including means disposed in the path of movement of said control elements for successive engagement thereby to actuate said switches to effect the opening and closing of said circuit and thereby effect the operation of a device for predetermined standard periods of time when said mechanism is driven at said standard speed, and said variable speed mechanism further including means for coupling any one of the remaining gears of one bank in series with any one of the gears of each of the other banks for varying said speed of the timer disk from standard s0 as to thereby vary the time of the opening and closing of said circuit by said switch actuating mechanism and the time intervals o! the actuation of said device from said standard periods of time.

7. In an apparatus of the character described, a driven support, a variable speed mechanism for driving said support and including a plurality of independent banks of shiftable gears, means adapted to selectively couple together any one of the gears of one bank in series with any one of the gears of each of the other banks for driving said supportv at diierent speeds, a manipulator for each gear, and independent means engaging each gear and its manipulator for selectively shifting the gears to active position upon actuation of the manipulators, and means coacting with the manipulators of each bank of gears for shifting an actively positioned gear of a bank to an inactive position simultaneously with the shifting of a gear in said bank to active position.

8. In an apparatus of the character described, a rotary support; a timer disk adapted to be mounted upon said support to turn therewith, said disk having a guide track and a plurality of control elements spaced along said track; a variable speed mechanism operatively connected to said support for driving the same; a timer head having guided engagement with said guide track; a plurality of switches controlled by said timer head and arranged respectively in circuits to be controlled thereby, said timer head having means disposed in the path of movement oi said control elements for successive engagement thereby to actuate said switches to effect the opening and 1. closing of said circuits; said variable speed mech- 5 anism including a plurality of independent banks of gears and means for selectively coupling together in series one gear of each lbank for driving said support and disk at relatively dierent speeds to vary the time interval of actuation of said switches.

9. In an apparatus of the character described, a driven support, a variable speed mechanism for driving the same including a plurality of independent banks of shiftable gears, a manipulator 15 for each gear for moving the same from an inactive to an active position, pneumatically operated means for automatically coupling the gear banks in series, and means operable upon initial movement of the variable speed mechanism to actuate said pneumatic means.

10. In an apparatus of the character described, a rotary support; a timer disk adapted to be mounted upon said support to turn therewith; said timer disk having a guide track and a plurality of control elements spaced along said track; a variable speed mechanism operatively connected to said support for driving the same; an electric circuit connected with a source of current supply; a timer head having guided engagement with said guide track and provided with a pair of switches in said circuit and said timer head having means disposed in the path of movement of said control elements for successive engagement thereby to actuate said switches to effect the opening and closing thereof and thereby eiecting the operation of a device; said variable speed mechanism including a plurality of independent banks of gears, means for selectively coupling together in series one gear of each bank 40 for driving said support and disk at different speeds to thereby vary the time interval of actuation of said switches and the actuation of said device for varying the time interval of operation thereof, and means co-acting with the last men- 45 tioned means for sluiting an actively positioned gear oi a bank to an inactive position simultaneously with the coupling of a gear in said bank in active position.

11. In an apparatus of the character described, 50 a rotary support; a timer disk adapted to be mounted upon said support to turn therewith; said timer disk having a guide track and a plurality of control elements spaced along said track; a variable speed mechanism operatively 55 connected to said support for driving the same; a timer head having guided engagement with said guide track and provided with a pair of switches in circuit with a device, said timer head having a rock shaft provided with means disposed in the 60 path of movement of said control elements for successive engagement thereby to actuate said rock shaft to thereby effect actuation ot said switches for operation of said device at a plurality of time intervals; said variable speed mech- 65 anism including a plurality of independent banks of gears and means for selectively coupling together in series one gear of each bank for driving said support and disk at different speeds to thereby vary the time intervals of actuation of 70 said switches and thereby varying the time intervals of operation of said device.

12. In an apparatus of the character described, a variable speed mechanism including a rotatable shaft, a plurality of shiftable gears mounted upshifting the detent bar in the opposite direction as the plunger is depressed to thereby release a previously depressed plunger, and means on eachplunger for normally projecting the same upwardly when released from the detent bar.

AUGUST C. HANSCH. HENRY E. HANSCH. 

